Active Filter Amplifier Type AF521 manufactured by NUCLEONIX is an extremely versatile linear pulse amplifier, intended for use with any type radiation detector, and pre-amplifier. This amplifier has low noise, fast overload recovery, good linearity and is capable of good resolution. It provides semi-gaussian pulse shaping with minimum system noise. This amplifier can be used for amplifying signals from X-ray proportional detectors or scintillation detectors or such other similar detectors.
It accepts either positive or negative detector pulses and can give unipolar output. Typically gain upto a maximum of 1000 is obtainable. Other features include pole zero compensation and control for both coarse, fine gains & shaping times.
Features
Uses solid state / integrated circuit design
Input : Accepts both positive or negative pulse input
Output : positive unipolar
Gain : Typical - 1000
Active shaping from 1 micro sec to 10 micro sec
Two bit module
Specifications
Input
Positive or negative, no rise-time limitation, 35 micro seconds minimum decay time constant, for pole zero cancellation. 1K ohms input impedance.
Output
Positive, Unipolar 0-8 volts linear with 10V saturation
Gain Adjustment
Controlled by three gain controls
Accuracy : +/-10%
a. Input attenuator : Attenuator factors x2.5 & x 1
b. Coarse gain : 0.2, 0.5, 1,2,3,5 & 10 by rotary switch
c. Fine gain : About adjustable by a ten turn helipot and knob/ precision dial.
Pulse shaping
Differentiating and integration RC time constants variable from 0.1 micro second to 5 micro second in sequence of 0.5, 1, 2, 3, 6, 10 with a provision of switching integration IN/OUT.
Maximum Gain
800
COARSE
control changes the gain from 1 to 32 binary sequence. FINE gain can be varied 3:1 continuously by a 10 turn helical potentiometer
Integral Non-linearity
0.1%
Noise
3 to 4 micro volts or less at maximum gain and 3 micro sec shaping time as referred to input
Power Requirements
+24V at 25mA ; -24V at 20 mA
+12V at 65mA ; -12V at 70 mA
Power Connector
Amphenol Connector Type : 26-159-24P-H (24 pin type) or NIM Standard connector [as per AEC specifications TID 20893 (Rev)]
Plot No.162 A & B, Phase-II, IDA, Cherlapally, Hyderabad-500051 India Phone:+91-40-27263701, 32918055, 32914548 Fax : 040 - 27262146
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